public class User {
    private int id;
    private String name;
    private String password;
    private int age;
    public User(){}
    public User(int id,String name,String password,int age){
        this.id=id;
        this.name=name;
        this.password=password;
        this.age=age;
    }
    @Override
    public String toString(){
        return "User [id:"+id+
        ",name:"+name+
        ",password:"+password+
        ",age:"+age+
        "]";
    }

}
